CN1937472A - Method and device for wireless communication system rebuilding transmission side processing timer - Google Patents

Abstract

A method for reconstructing a transmitting side processing timer in a wireless communication system, wherein a wireless link control unit of a communication device of the wireless communication system has a transmitting side and a receiving side, and the method comprises: in the wireless link control unit of the communication device, only the transmitting side is reconstructed; a first timer corresponding to the transmitting side is stopped; and a second timer corresponding to the receiving side is continued without stopping.

Description

Method and device for wireless communication system rebuilding transmission side processing timer

technical field

The present invention relates to a method for re-establishing a transmission edge in a wireless communication system and its related communication device, in particular to a method for processing a timer and its related communication when only the transmission edge of the wireless link control layer can be rebuilt. device.

Background technique

The third-generation mobile communication system adopts the wireless access method of Wideband Code Division Multiple Access (WCDMA), which can provide high spectrum utilization efficiency, extremely high coverage and high-quality, high-speed multimedia data transmission. It can meet various QoS service requirements at the same time, provide flexible and diversified two-way transmission services, provide better communication quality, and effectively reduce the communication interruption rate.

Taking the communication protocol specification formulated by the ^3rd Generation Partnership Proiect (3GPP) as an example, for the access related part (Access Stratum, AS), the Radio Resource Control (RRC) is formulated , Radio Link Control (RLC), Media Access Control (Media Access Control, MAC), Packet Data Convergence Protocol (PDCP), Broadcast and Multicast Control (Broadcast/Multicast Control, BMC), etc. Several sublayers with different functions. In addition, the third-generation mobile communication system can provide different levels of transmission quality, and can operate in different modes according to different transmission quality requirements, such as: Transparent Mode (Transparent Mode, TM), Unacknowledged Mode (Unacknowledged Mode, UM), Acknowledged Mode (AM). The transparent mode is suitable for services that require high real-time transmission, the non-confirmation mode is suitable for services that require both real-time transmission and packet order, and the confirmation mode is suitable for services that do not require high real-time transmission but require high data accuracy. High service.

In the acknowledged mode, the radio link control layer is a combination of a transmitting side (Transmitting Side) and a receiving side (Receiving Side). The transmit side and the receive side refer to the parts of the radio link control layer that process transmission and reception respectively, and the two can share system resources. In some cases, the RLC layer needs to be rebuilt (for example, when the size of the protocol data unit is changed), and the prior art rebuilds the RLC layer by rebuilding the transmit side or the receive side.

For the related operations of rebuilding the radio link control layer, the communication protocol specification "3GPP TS 25.322 V6.4.0 (2005-06), "Radio Link Control (RLC) protocol specification (Release 6)" formulated by the Third Generation Mobile Communications Alliance " and a revised proposal (Correct Request) "R2-052168 "Single Sided RLC Re-establishment", Motorola, 3GPP RAN2 #48meeting, August 2005", has been detailed. Its content is summarized as follows: When the transmitting side and/or receiving side of an AM RLC entity in confirmation mode is reestablished by the upper layer, the radio link control unit should perform the following two operations:

1. If the receiving side of the wireless link control unit (the downlink of the mobile phone or the uplink of the network side) is rebuilt, the protocol state variables (VR(R), VR(H) and VR(H) corresponding to the receiving side are reset. MR)); setting the configurable (Configurable) protocol parameters (Configured_Tx_Window_Size and Configured_Rx_Window_Size) corresponding to the receiving side to be correct values; setting the hyperframe number (Hyper Frame Number) of the receiving side to be the value set by the upper layer; and Delete all the control PDUs on the receiving side and the transmitting side, and delete the data PDUs on the receiving side. If the receiving side is reconstructed unilaterally, the above-mentioned two prior arts do not disclose the processing method of the timer.

2. If the transmitting side of the wireless link control unit (the uplink of the mobile phone or the downlink of the network side) is rebuilt, then reset the protocol state variables (VT(S), VT(A), VT( DAT), VT (MS), VT (PDU), VT (SDU), VT (RST), VT (MRW) and VT (WS)); set the configurable (Configurable) protocol parameters corresponding to the transmitting side ( MaxDAT, Poll_PDU, Poll_SDU, Poll_Window, MaxRST, MaxMRW, OSD_Window_Size, and DAR_Window_Size) are correct values; set the Hyper Frame Number of the transmitting side to the value set by the upper layer. Under this operation, if only the transmitting side of the wireless link control unit is rebuilt, delete all the control protocol data units on both sides of the receiving side and the transmitting side, and delete the successfully transmitted servo data units in the transmitting side; The size of the data unit, re-segment the undeleted servo data unit into protocol data unit. If the transmitting side and the receiving side of the RLC unit are rebuilt at the same time, the control PDUs of the receiving side and the transmitting side are deleted, and the data PDUs of the receiving side are deleted. If the transmitting side is rebuilt, regardless of whether the receiving side is rebuilt, stop the periodic timing poll timer (Timer_Poll_Periodic), the periodic status report timer (Timer_Status_Periodic) and the delete SDU timer corresponding to the SDU that has not been deleted ( All timers except Timer_Discard). Finally, if necessary, prompt the upper layer with the information of the deleted SDU.

As mentioned above, when only the transmitting side is rebuilt, the prior art will delete all control protocol data units (control PDUs) on both sides of the receiving side and the transmitting side, and a periodic polling timer (Timer_Poll_Periodic ), a periodic status report timer (Timer_Status_Periodic) and all timers except the delete SDU timer (Timer_Discard) of the SDU that has not been deleted are stopped. That is, a status report prohibition timer (Timer_Status_Prohibit) may be stopped. If the status report suspension timer is stopped, the output of the status report unit on the receiving side will not be limited by the status report suspension timer, causing the status report unit to be transmitted unnecessarily many times, thus causing a waste of wireless resources .

Contents of the invention

Therefore, the main purpose of the present invention is to provide a method for re-establishing the transmission edge processing timer in a wireless communication system and a related mobile communication device, so as to improve the shortcomings of the prior art.

The present invention discloses a method for reestablishing a transmission edge processing timer in a wireless communication system, comprising a wireless link control unit of a communication device, only one transmission edge is rebuilt; a first transmission edge corresponding to the transmission edge is stopped timer; and a second timer corresponding to the receiving edge that lasts without stopping, the second timer is an aperiodic timer.

The present invention also discloses a method for reestablishing a transmission edge processing timer in a wireless communication system. In a wireless link control unit of a communication device, only one transmission edge is rebuilt; a first transmission edge corresponding to the transmission edge is stopped. a timer; and continuing without stopping all timers corresponding to the receiving edge.

The present invention also discloses a communication device used in a wireless communication system to correctly reconstruct the transmitting side. The communication device includes a control circuit used to realize the functions of the communication device; a central processing unit used to execute a program code to control the control circuit; and a storage device to store the program code. One of the two methods disclosed above is included in the program code.

Description of drawings

FIG. 1 is a functional block diagram of a wireless communication device.

FIG. 2 is a schematic diagram of a program code in FIG. 1 .

Fig. 3 is a flowchart of an embodiment of the present invention.

Description of reference symbols

100 wireless communication device

102 input device

104 output device

106 control circuit

108 CPU

110 storage device

112 program code

114 transceivers

200 application layer

202 Layer 3 interface

206 Layer 2 interface

208 Servo data unit

212 buffer

214 protocol data unit

218 The first layer interface

220 Rebuild launch side program code

30 process

300, 302, 304, 306, 308 steps

Detailed ways

In the communication protocol specification "3GPP TS 25.322 V6.4.0 (2005-06), "Radio Link Control (RLC) protocol specification (Release 6)" formulated by the Third Generation Mobile Communications Alliance, according to different operational requirements, define Data such as parameters, variables, timers, and control protocol data units. For parameters, variables, and timers, those skilled in the art can define objects corresponding to different parameters, variables, or timers as the transmitting side or receiving side of the radio link control layer according to the above-mentioned communication protocol specification. Taking the protocol state variables of confirmation mode as an example, the protocol state variables corresponding to the receiving side include: VR(R), VR(H) and VR(MR); the protocol state variables corresponding to the transmitting side include: VT(S ), VT(A), VT(DAT), VT(MS), VT(PDU), VT(SDU), VT(RST), VT(MRW) and VT(WS). In terms of timers, the timers corresponding to the receiving side include: Timer_Status_Periodic (periodic status report timer) and Timer_Status_Prohibit (status report suspension timer); the timers corresponding to the transmitting side include: Timer_Poll (request timer ), Timer_Poll_Periodic (periodic timing query timer), Timer_Poll_Prohibit (query suspension timer), Timer_Discard (delete servo data unit timer), Timer_RST (reset timer) and Timer_MRW (moving receive window timer). In terms of protocol parameters, the protocol parameters corresponding to the receiving side include: Configured_Tx_Window_Size and Configured_Rx_Window_Size; the protocol parameters corresponding to the transmitting side include: MaxDAT, Poll_PDU, Poll_SDU, Poll_Window, MaxRST, MaxMRW, OSD_Window_Size and DAR_Window_Size. For the definition of the above-mentioned protocol state variables, timers or protocol parameters, reference may be made to the aforementioned communication protocol specification, and details are not repeated here.

The present invention is aimed at a wireless communication system operating in an acknowledged mode (Acknowledged Mode), and is used for correctly reconstructing a transmitting side, improving radio transmission efficiency and avoiding system errors. Wherein, the wireless communication system is preferably a third generation mobile communication system.

Please refer to FIG. 1 , which is a functional block diagram of a wireless communication device 100 . For simplicity, FIG. 1 only shows an input device 102 , an output device 104 , a control circuit 106 , a CPU 108 , a storage device 110 , a program code 112 and a transceiver 114 of the wireless communication device 100 . In the wireless communication device 100, the control circuit 106 executes the program code 112 stored in the storage device 110 through the central processing unit 108, thereby controlling the operation of the wireless communication device 100, which can receive user input through the input device 102 (such as a keyboard) signals, or output images, sounds and other signals through the output device 104 (such as a screen, a speaker, etc.). The transceiver 114 is used for receiving or sending wireless signals, and transmitting the received signals to the control circuit 106 , or outputting the signals generated by the control circuit 106 by radio. In other words, in terms of the structure of the communication protocol, the transceiver 114 can be regarded as a part of the first layer, and the control circuit 106 is used to realize the functions of the second layer and the third layer.

Please continue to refer to FIG. 2 , which is a schematic diagram of the program code 112 in FIG. 1 . The program code 112 includes an application program layer 200 , a layer 3 interface 202 and a layer 2 interface 206 , and is connected to a layer 1 interface 218 . When transmitting a signal, the layer 2 interface (that is, the radio link control layer) 206 forms a plurality of service data units (Service Data Unit) 208 according to the data output by the layer 3 interface 202 and stores them in a buffer 212 . Then, according to the servo data unit 208 stored in the buffer 212, the second layer interface 206 generates a plurality of protocol data units (Protocol Data Unit) 214, and the generated protocol data unit 214 is output to the destination side. On the contrary, when receiving a wireless signal, the signal is received through the layer 1 interface 218 , and the received signal is output to the layer 2 interface 206 in the protocol data unit 214 . The Layer 2 interface 206 restores the PDU 214 into a SDU 208 and stores it in the buffer 212 . Finally, the layer 2 interface 206 transmits the servo data unit 208 stored in the buffer 212 to the layer 3 interface 202 .

When the wireless communication device 100 operates in the confirmation mode, the second layer interface 206 is a combination of a transmitting side (Transmitting Side) and a receiving side (Receiving Side), and the transmitting side and the receiving side refer to the transmission and reception of the radio link control layer respectively. part. In some cases, the transmitting side of the layer 2 interface 206 needs to be rebuilt, so the present invention can rebuild the transmitting side of the layer 2 interface 206 according to a program code 220 for rebuilding the transmitting side in the program code 112 .

Please refer to FIG. 3 , which is a schematic diagram of a process 30 according to an embodiment of the present invention. The process 30 is used for re-establishing the transmitting edge in a wireless communication system, and can be compiled into the program code 220 for re-establishing the transmitting edge. Process 30 includes the following steps:

Step 300: start.

Step 302: In a radio link control unit of a communication device, only one transmit edge is reestablished.

Step 304: Stop a first timer corresponding to the transmit edge.

Step 306: Continue without stopping a second timer corresponding to a receiving edge, the second timer is an aperiodic timer.

Step 308: end.

According to the process 30, when the RLC unit only re-establishes the transmitting edge, the present invention stops the first timer corresponding to the transmitting edge and does not stop the second timer corresponding to the receiving edge. Preferably, the first timer corresponds to all timers other than the deleted SDU timer (Timer_Discard) and the periodic timing query timer (Timer_Poll_Periodic) of the SDUs not yet deleted in the timers on the transmitting side, namely Stop the reminder timer Timer_Poll, query the suspension timer Timer_Poll_Prohibit, reset the timer Timer_RST and move the receiving window timer Timer_MRW. The second timer corresponding to the receiving side can be a periodic status report timer (Timer_Status_Periodic) or a status report suspension timer (Timer_Status_Prohibit). Since the prior art does not stop all periodic timers, the present invention specifically refers to non-periodic timers. Therefore, in step 306, the second timer is a status report prohibition timer (Timer_Status_Prohibit), or other non-periodic timers. Therefore, through the process 30, when the RLC unit only re-establishes the transmission edge, the RLC unit is the same as the prior art, keeping the SDU timer (Timer_Discard) and the periodic timing of the SDUs that have not been deleted. In addition to the polling timer (Timer_Poll_Periodic) and the periodic status reporting timer (Timer_Status_Periodic), the status reporting suspension timer (Timer_Status_Prohibit) is also kept running.

Another preferred embodiment of the present invention is the same as the above-mentioned process 30, but step 306 is changed to "continue without stopping all timers corresponding to a receiving side".

In short, when the RLC unit only rebuilds the transmit edge, a preferred embodiment of the present invention stops the delete SDU timer and the periodic timing query timing corresponding to the SDUs in the transmit edge that have not been deleted All timers other than the timer, and all timers corresponding to the receiving side (periodic status report timer and status report suspension timer) will not be stopped. In this way, wireless resources can be avoided from being wasted. For example, according to the process 30, if a radio link control unit only re-establishes the transmitting side (that is, the uplink of the mobile phone or the downlink of the network side), the status report suspension timer will not be stopped, and the status of the receiving side The output of the reporting unit is limited by the status reporting suspension timer, thereby preventing the status reporting unit from outputting too many times and saving wireless resources.

In short, the present invention can maintain the deleted SDU timer, the periodic timing query timer, the periodic status report timer and the status report suspend timer of the SDUs that have not been deleted when only the transmitting edge is rebuilt. The timer continues to count. In this case, since the status report suspension timer keeps counting, the status report unit will not be transmitted too many times, so as to avoid wasting of radio resources.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (8)

1. A method for reestablishing a transmit edge processing timer in a wireless communication system, a wireless link control unit of a communication device of the wireless communication system has a transmit edge and a receive edge, the method comprising: In the wireless link control unit of the communication device, only the transmitting edge is reestablished; stopping a first timer corresponding to the transmit edge; and continuing without stopping a second timer corresponding to the receiving side; Wherein the second timer is not a periodic timer. 2. A method for reestablishing a transmit edge processing timer in a wireless communication system, a wireless link control unit of a communication device of the wireless communication system has a transmit edge and a receive edge, the method comprising: In the wireless link control unit of the communication device, only the transmitting edge is reestablished; stopping a first timer corresponding to the transmit edge; and Continue without stopping all timers corresponding to this receive edge. 3. A communication device for a wireless communication system, a wireless link control unit of the communication device has a transmitting side and a receiving side for correctly recreating the transmitting side, the communication device includes: a control circuit, used to realize the function of the communication device; a central processing unit for executing a program code to control the control circuit; and A storage device for storing the program code; wherein the program code includes the method as claimed in claim 1 or claim 2. 4. The method as claimed in claim 1 and claim 2 and the communication device according to claim 3, wherein stopping the first timer corresponding to the transmitting side is stopping a not yet deleted corresponding to the transmitting side Delete all timers except the servo data unit timer and the periodic timing query timer of the servo data unit. 5. The method of claim 1 and the communication device of claim 3, wherein the periodic timer is a periodic status report timer. 6. The method as claimed in claim 1 and the communication device as claimed in claim 3, wherein the second timer corresponding to the receiving side is a status report disable timer. 7. The method as claimed in claim 1 and claim 2 and the communication device as claimed in claim 3, wherein the wireless communication system is operated in a confirmation mode. 8. The method as claimed in claim 1 and claim 2 and the communication device as claimed in claim 3, wherein the communication device is a mobile phone, a wireless mobile communication device or a network device.

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